Where to enter your Office product key - Microsoft Support If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription
Activate Windows - Microsoft Support Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account
Product keys for Windows - Microsoft Support A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow
Microsoft account recovery code A Microsoft account recovery code is a 25-digit code used to help you regain access to your account if you forget your password or if your account is compromised
Using product keys with Microsoft 365 - Microsoft Support Use your Microsoft account , not your product key, to install and activate Office and individually purchased Microsoft 365 apps, such as Project, Visio, Word, Excel, and Outlook